Question

A machine gun take 10s to fire 30 bullets with the velocity of 500m/s. Find the power developed by the gun if each bullet a mass of 100g

Answer 1

Given, mass of 30 bullets = 30 x 100 = 3 kg Velocity, v = 500 m, time, t = 10 s

Power developed by the gun, P = w/t

[Here, work done by gun will be equal to the kinetic energy of all the bullets.]

P=KE/t = 1/2 m ${{v}^{2}}$ / t = m ${{v}^{2}}$ / t

= 3 x 500 x 500 / 2 x 10 = 37500 W

Answer 2

the mass of one bullet is 30 and the mass of 30 pullets is thicker ji sohar time is 10 seconds and power is equals to w up on it so potential energy is equal to kinetic energy kinetic energy is equal to 1 upon 2 MV square so we found the power